/* Config */
:root {
    --sk-size: 40px;
    --sk-color: #333;
  }
  
  
  /* Utility class for centering */
  .sk-center { margin: auto; }
  
  
  /*  Plane
  
        <div class="sk-plane"></div>
   */
  .sk-plane {
    width: var(--sk-size);
    height: var(--sk-size);
    background-color: var(--sk-color);
    animation: sk-plane 1.2s infinite ease-in-out; 
  }
  
  @keyframes sk-plane {
    0% {
      transform: perspective(120px) rotateX(0deg) rotateY(0deg); 
    } 50% {
      transform: perspective(120px) rotateX(-180.1deg) rotateY(0deg); 
    } 100% {
      transform: perspective(120px) rotateX(-180deg) rotateY(-179.9deg); 
    } 
  }
  
  
  /*  Chase
  
        <div class="sk-chase">
          <div class="sk-chase-dot"></div>
          <div class="sk-chase-dot"></div>
          <div class="sk-chase-dot"></div>
          <div class="sk-chase-dot"></div>
          <div class="sk-chase-dot"></div>
          <div class="sk-chase-dot"></div>
        </div>
   */
  .sk-chase {
    width: var(--sk-size);
    height: var(--sk-size);
    position: relative;
    animation: sk-chase 2.5s infinite linear both; 
  }
  
  .sk-chase-dot {
    width: 100%;
    height: 100%;
    position: absolute;
    left: 0;
    top: 0; 
    animation: sk-chase-dot 2.0s infinite ease-in-out both; 
  }
  
  .sk-chase-dot:before {
    content: '';
    display: block;
    width: 25%;
    height: 25%;
    background-color: var(--sk-color);
    border-radius: 100%;
    animation: sk-chase-dot-before 2.0s infinite ease-in-out both; 
  }
  
  .sk-chase-dot:nth-child(1) { animation-delay: -1.1s; }
  .sk-chase-dot:nth-child(2) { animation-delay: -1.0s; }
  .sk-chase-dot:nth-child(3) { animation-delay: -0.9s; }
  .sk-chase-dot:nth-child(4) { animation-delay: -0.8s; }
  .sk-chase-dot:nth-child(5) { animation-delay: -0.7s; }
  .sk-chase-dot:nth-child(6) { animation-delay: -0.6s; }
  .sk-chase-dot:nth-child(1):before { animation-delay: -1.1s; }
  .sk-chase-dot:nth-child(2):before { animation-delay: -1.0s; }
  .sk-chase-dot:nth-child(3):before { animation-delay: -0.9s; }
  .sk-chase-dot:nth-child(4):before { animation-delay: -0.8s; }
  .sk-chase-dot:nth-child(5):before { animation-delay: -0.7s; }
  .sk-chase-dot:nth-child(6):before { animation-delay: -0.6s; }
  
  @keyframes sk-chase {
    100% { transform: rotate(360deg); } 
  }
  
  @keyframes sk-chase-dot {
    80%, 100% { transform: rotate(360deg); } 
  }
  
  @keyframes sk-chase-dot-before {
    50% {
      transform: scale(0.4); 
    } 100%, 0% {
      transform: scale(1.0); 
    } 
  }
  
  
  /*  Bounce
  
        <div class="sk-bounce">
          <div class="sk-bounce-dot"></div>
          <div class="sk-bounce-dot"></div>
        </div>
    */
  .sk-bounce {
    width: var(--sk-size);
    height: var(--sk-size);
    position: relative;
  }
  
  .sk-bounce-dot {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color: var(--sk-color);
    opacity: 0.6;
    position: absolute;
    top: 0;
    left: 0;
    animation: sk-bounce 2s infinite cubic-bezier(0.455, 0.03, 0.515, 0.955); 
  }
  
  .sk-bounce-dot:nth-child(2) { animation-delay: -1.0s; }
  
  @keyframes sk-bounce {
    0%, 100% {
      transform: scale(0);
    } 45%, 55% {
      transform: scale(1); 
    } 
  }
  
  
  /*  Wave
  
        <div class="sk-wave">
          <div class="sk-wave-rect"></div>
          <div class="sk-wave-rect"></div>
          <div class="sk-wave-rect"></div>
          <div class="sk-wave-rect"></div>
          <div class="sk-wave-rect"></div>
        </div>
   */
  .sk-wave {
    width: var(--sk-size);
    height: var(--sk-size);
    display: flex;
    justify-content: space-between;
  }
  
  .sk-wave-rect {
    background-color: var(--sk-color);
    height: 100%;
    width: 15%;
    animation: sk-wave 1.2s infinite ease-in-out; 
  }
  
  .sk-wave-rect:nth-child(1) { animation-delay: -1.2s; }
  .sk-wave-rect:nth-child(2) { animation-delay: -1.1s; }
  .sk-wave-rect:nth-child(3) { animation-delay: -1.0s; }
  .sk-wave-rect:nth-child(4) { animation-delay: -0.9s; }
  .sk-wave-rect:nth-child(5) { animation-delay: -0.8s; }
  
  @keyframes sk-wave {
    0%, 40%, 100% {
      transform: scaleY(0.4); 
    } 20% {
      transform: scaleY(1); 
    } 
  }
  
  
  /*  Pulse
  
        <div class="sk-pulse"></div>
   */
  .sk-pulse {
    width: var(--sk-size);
    height: var(--sk-size);
    background-color: var(--sk-color);
    border-radius: 100%;
    animation: sk-pulse 1.2s infinite cubic-bezier(0.455, 0.03, 0.515, 0.955); 
  }
  
  @keyframes sk-pulse {
    0% {
      transform: scale(0); 
    } 100% {
      transform: scale(1);
      opacity: 0; 
    }
  }
  
  
  /*  Flow
  
        <div class="sk-flow">
          <div class="sk-flow-dot"></div>
          <div class="sk-flow-dot"></div>
          <div class="sk-flow-dot"></div>
        </div>
   */
  .sk-flow {
    width: calc(var(--sk-size) * 1.3);
    height: calc(var(--sk-size) * 1.3);
    display: flex;
    justify-content: space-between;
  }
  
  .sk-flow-dot {
    width: 25%;
    height: 25%;
    background-color: var(--sk-color);
    border-radius: 50%;
    animation: sk-flow 1.4s cubic-bezier(0.455, 0.03, 0.515, 0.955) 0s infinite both;
  }
  
  .sk-flow-dot:nth-child(1) { animation-delay: -0.30s; }
  .sk-flow-dot:nth-child(2) { animation-delay: -0.15s; }
  
  @keyframes sk-flow {
    0%, 80%, 100% {
      transform: scale(0.3); }
    40% {
      transform: scale(1); 
    }
  }
  
  
  /*  Swing
  
        <div class="sk-swing">
          <div class="sk-swing-dot"></div>
          <div class="sk-swing-dot"></div>
        </div>
   */
  .sk-swing {
    width: var(--sk-size);
    height: var(--sk-size);
    position: relative;
    animation: sk-swing 1.8s infinite linear; 
  }
    
  .sk-swing-dot {
    width: 45%;
    height: 45%;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    margin: auto;
    background-color: var(--sk-color);
    border-radius: 100%;
    animation: sk-swing-dot 2s infinite ease-in-out; 
  }
  
  .sk-swing-dot:nth-child(2) {
    top: auto;
    bottom: 0;
    animation-delay: -1s; 
  }
  
  @keyframes sk-swing {
    100% {
      transform: rotate(360deg); 
    } 
  }
  
  @keyframes sk-swing-dot {
    0%, 100% {
      transform: scale(0.2); }
    50% {
      transform: scale(1); 
    } 
  }
  
  
  /*  Circle
  
        <div class="sk-circle">
          <div class="sk-circle-dot"></div>
          <div class="sk-circle-dot"></div>
          <div class="sk-circle-dot"></div>
          <div class="sk-circle-dot"></div>
          <div class="sk-circle-dot"></div>
          <div class="sk-circle-dot"></div>
          <div class="sk-circle-dot"></div>
          <div class="sk-circle-dot"></div>
          <div class="sk-circle-dot"></div>
          <div class="sk-circle-dot"></div>
          <div class="sk-circle-dot"></div>
          <div class="sk-circle-dot"></div>
        </div>
   */
  .sk-circle {
    width: var(--sk-size);
    height: var(--sk-size);
    position: relative; 
  }
  
  .sk-circle-dot {
    width: 100%;
    height: 100%;
    position: absolute;
    left: 0;
    top: 0;
  }
  
  .sk-circle-dot:before {
      content: '';
      display: block;
      width: 15%;
      height: 15%;
      background-color: var(--sk-color);
      border-radius: 100%;
      animation: sk-circle 1.2s infinite ease-in-out both; 
  }
  
  .sk-circle-dot:nth-child(1) { transform: rotate(30deg); }
  .sk-circle-dot:nth-child(2) { transform: rotate(60deg); }
  .sk-circle-dot:nth-child(3) { transform: rotate(90deg); }
  .sk-circle-dot:nth-child(4) { transform: rotate(120deg); }
  .sk-circle-dot:nth-child(5) { transform: rotate(150deg); }
  .sk-circle-dot:nth-child(6) { transform: rotate(180deg); }
  .sk-circle-dot:nth-child(7) { transform: rotate(210deg); }
  .sk-circle-dot:nth-child(8) { transform: rotate(240deg); }
  .sk-circle-dot:nth-child(9) { transform: rotate(270deg); }
  .sk-circle-dot:nth-child(10) { transform: rotate(300deg); }
  .sk-circle-dot:nth-child(11) { transform: rotate(330deg); }
  .sk-circle-dot:nth-child(1):before { animation-delay: -1.1s; }
  .sk-circle-dot:nth-child(2):before { animation-delay: -1s; }
  .sk-circle-dot:nth-child(3):before { animation-delay: -0.9s; }
  .sk-circle-dot:nth-child(4):before { animation-delay: -0.8s; }
  .sk-circle-dot:nth-child(5):before { animation-delay: -0.7s; }
  .sk-circle-dot:nth-child(6):before { animation-delay: -0.6s; }
  .sk-circle-dot:nth-child(7):before { animation-delay: -0.5s; }
  .sk-circle-dot:nth-child(8):before { animation-delay: -0.4s; }
  .sk-circle-dot:nth-child(9):before { animation-delay: -0.3s; }
  .sk-circle-dot:nth-child(10):before { animation-delay: -0.2s; }
  .sk-circle-dot:nth-child(11):before { animation-delay: -0.1s; }
  
  @keyframes sk-circle {
    0%, 80%, 100% {
      transform: scale(0); }
    40% {
      transform: scale(1); 
    } 
  }
  
  
  /*  Circle Fade
  
        <div class="sk-circle-fade">
          <div class="sk-circle-fade-dot"></div>
          <div class="sk-circle-fade-dot"></div>
          <div class="sk-circle-fade-dot"></div>
          <div class="sk-circle-fade-dot"></div>
          <div class="sk-circle-fade-dot"></div>
          <div class="sk-circle-fade-dot"></div>
          <div class="sk-circle-fade-dot"></div>
          <div class="sk-circle-fade-dot"></div>
          <div class="sk-circle-fade-dot"></div>
          <div class="sk-circle-fade-dot"></div>
          <div class="sk-circle-fade-dot"></div>
          <div class="sk-circle-fade-dot"></div>
        </div>
   */
  .sk-circle-fade {
    width: var(--sk-size);
    height: var(--sk-size);
    position: relative; 
  }
  
  .sk-circle-fade-dot {
    width: 100%;
    height: 100%;
    position: absolute;
    left: 0;
    top: 0; 
  }
  
  .sk-circle-fade-dot:before {
    content: '';
    display: block;
    width: 15%;
    height: 15%;
    background-color: var(--sk-color);
    border-radius: 100%;
    animation: sk-circle-fade 1.2s infinite ease-in-out both; 
  }
  
  .sk-circle-fade-dot:nth-child(1)  { transform: rotate(30deg);  }
  .sk-circle-fade-dot:nth-child(2)  { transform: rotate(60deg);  }
  .sk-circle-fade-dot:nth-child(3)  { transform: rotate(90deg);  }
  .sk-circle-fade-dot:nth-child(4)  { transform: rotate(120deg); }
  .sk-circle-fade-dot:nth-child(5)  { transform: rotate(150deg); }
  .sk-circle-fade-dot:nth-child(6)  { transform: rotate(180deg); }
  .sk-circle-fade-dot:nth-child(7)  { transform: rotate(210deg); }
  .sk-circle-fade-dot:nth-child(8)  { transform: rotate(240deg); }
  .sk-circle-fade-dot:nth-child(9)  { transform: rotate(270deg); }
  .sk-circle-fade-dot:nth-child(10) { transform: rotate(300deg); }
  .sk-circle-fade-dot:nth-child(11) { transform: rotate(330deg); }
  .sk-circle-fade-dot:nth-child(1):before  { animation-delay: -1.1s; }
  .sk-circle-fade-dot:nth-child(2):before  { animation-delay: -1.0s; }
  .sk-circle-fade-dot:nth-child(3):before  { animation-delay: -0.9s; }
  .sk-circle-fade-dot:nth-child(4):before  { animation-delay: -0.8s; }
  .sk-circle-fade-dot:nth-child(5):before  { animation-delay: -0.7s; }
  .sk-circle-fade-dot:nth-child(6):before  { animation-delay: -0.6s; }
  .sk-circle-fade-dot:nth-child(7):before  { animation-delay: -0.5s; }
  .sk-circle-fade-dot:nth-child(8):before  { animation-delay: -0.4s; }
  .sk-circle-fade-dot:nth-child(9):before  { animation-delay: -0.3s; }
  .sk-circle-fade-dot:nth-child(10):before { animation-delay: -0.2s; }
  .sk-circle-fade-dot:nth-child(11):before { animation-delay: -0.1s; }
  
  @keyframes sk-circle-fade {
    0%, 39%, 100% {
      opacity: 0;
      transform: scale(0.6);
    } 40% {
      opacity: 1; 
      transform: scale(1);
    }
  }
  
  
  /*  Grid
  
      <div class="sk-grid">
        <div class="sk-grid-cube"></div>
        <div class="sk-grid-cube"></div>
        <div class="sk-grid-cube"></div>
        <div class="sk-grid-cube"></div>
        <div class="sk-grid-cube"></div>
        <div class="sk-grid-cube"></div>
        <div class="sk-grid-cube"></div>
        <div class="sk-grid-cube"></div>
        <div class="sk-grid-cube"></div>
      </div>
   */
  .sk-grid {
    width: var(--sk-size);
    height: var(--sk-size);
    /* Cube positions
     * 1 2 3
     * 4 5 6
     * 7 8 9
     */ 
   }
  .sk-grid-cube {
      width: 33.33%;
      height: 33.33%;
      background-color: var(--sk-color);
      float: left;
      animation: sk-grid 1.3s infinite ease-in-out; 
  }
  .sk-grid-cube:nth-child(1) { animation-delay: 0.2s; }
  .sk-grid-cube:nth-child(2) { animation-delay: 0.3s; }
  .sk-grid-cube:nth-child(3) { animation-delay: 0.4s; }
  .sk-grid-cube:nth-child(4) { animation-delay: 0.1s; }
  .sk-grid-cube:nth-child(5) { animation-delay: 0.2s; }
  .sk-grid-cube:nth-child(6) { animation-delay: 0.3s; }
  .sk-grid-cube:nth-child(7) { animation-delay: 0.0s; }
  .sk-grid-cube:nth-child(8) { animation-delay: 0.1s; }
  .sk-grid-cube:nth-child(9) { animation-delay: 0.2s; }
  
  @keyframes sk-grid {
    0%, 70%, 100% {
      transform: scale3D(1, 1, 1); 
    } 35% {
      transform: scale3D(0, 0, 1); 
    } 
  }
  
  
  /*  Fold
  
        <div class="sk-fold">
          <div class="sk-fold-cube"></div>
          <div class="sk-fold-cube"></div>
          <div class="sk-fold-cube"></div>
          <div class="sk-fold-cube"></div>
        </div>
   */
  .sk-fold {
    width: var(--sk-size);
    height: var(--sk-size);
    position: relative;
    transform: rotateZ(45deg); 
  }
  .sk-fold-cube {
    float: left;
    width: 50%;
    height: 50%;
    position: relative;
    transform: scale(1.1); 
  }
  
  .sk-fold-cube:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--sk-color);
    animation: sk-fold 2.4s infinite linear both;
    transform-origin: 100% 100%; 
  }
  .sk-fold-cube:nth-child(2) { transform: scale(1.1) rotateZ(90deg); }
  .sk-fold-cube:nth-child(4) { transform: scale(1.1) rotateZ(180deg); }
  .sk-fold-cube:nth-child(3) { transform: scale(1.1) rotateZ(270deg); }
  .sk-fold-cube:nth-child(2):before { animation-delay: 0.3s; }
  .sk-fold-cube:nth-child(4):before { animation-delay: 0.6s; }
  .sk-fold-cube:nth-child(3):before { animation-delay: 0.9s; }
  
  @keyframes sk-fold {
    0%, 10% {
      transform: perspective(140px) rotateX(-180deg);
      opacity: 0; 
    } 25%, 75% {
      transform: perspective(140px) rotateX(0deg);
      opacity: 1; 
    } 90%, 100% {
      transform: perspective(140px) rotateY(180deg);
      opacity: 0;
    } 
  }
  
  
  /*  Wander
  
        <div class="sk-wander">
          <div class="sk-wander-cube"></div>
          <div class="sk-wander-cube"></div>
          <div class="sk-wander-cube"></div>
          <div class="sk-wander-cube"></div>
        </div>
   */
  .sk-wander {
    width: var(--sk-size);
    height: var(--sk-size);
    position: relative; 
  }
  
  .sk-wander-cube {
    background-color: var(--sk-color);
    width: 20%;
    height: 20%;
    position: absolute;
    top: 0;
    left: 0;
    --sk-wander-distance: calc(var(--sk-size) * 0.75);
    animation: sk-wander 2.0s ease-in-out -2.0s infinite both;
  }
  .sk-wander-cube:nth-child(2) { animation-delay: -0.5s; }
  .sk-wander-cube:nth-child(3) { animation-delay: -1.0s; }
  
  @keyframes sk-wander {
    0% {
      transform: rotate(0deg); 
    } 25% {
      transform: translateX(var(--sk-wander-distance)) rotate(-90deg) scale(0.6); 
    } 50% { /* Make FF rotate in the right direction */
      transform: translateX(var(--sk-wander-distance)) translateY(var(--sk-wander-distance)) rotate(-179deg); 
    } 50.1% {
      transform: translateX(var(--sk-wander-distance)) translateY(var(--sk-wander-distance)) rotate(-180deg); 
    } 75% {
      transform: translateX(0) translateY(var(--sk-wander-distance)) rotate(-270deg) scale(0.6);
    } 100% {
      transform: rotate(-360deg); 
    }
  }